CVE-2019-4539

Name: CVE-2019-4539
Creator: NVD / NIST
Published: 2019-10-02T15:15:10.547+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.1/10EPSS 1.23%

Last modified Jun 17, 2026

CVE-2019-4539 is a high-severity vulnerability rated 7.1/10 on the CVSS scale. IBM Security Directory Server 6.4.0 does not properly neutralize special elements that are used in XML, allowing attackers to modify the syntax, content, or commands of the XML before it is processed by an end system. IBM X-Force ID: 165812.. EPSS estimates a 1.23% chance of exploitation in the next 30 days.

Description

IBM Security Directory Server 6.4.0 does not properly neutralize special elements that are used in XML, allowing attackers to modify the syntax, content, or commands of the XML before it is processed by an end system. IBM X-Force ID: 165812.

Metrics

CVSS 3.1

7.1/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H

EPSS Probability

1.23%

65.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-91

Affected Software

Vendor	Product	Versions
Ibm	Security Directory Server	6.4.0

References

https://exchange.xforce.ibmcloud.com/vulnerabilities/165812VDB Entry, Vendor Advisory
https://www.ibm.com/support/pages/node/1077045Patch, Vendor Advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/165812VDB Entry, Vendor Advisory
https://www.ibm.com/support/pages/node/1077045Patch, Vendor Advisory

Timeline

Published: Oct 2, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-4539?

How severe is CVE-2019-4539?

CVE-2019-4539 has a CVSS score of 7.1/10 (HIGH severity). The EPSS model estimates a 1.23% probability of exploitation in the next 30 days.

How do I fix CVE-2019-4539?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2019-4539?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST